Patents Examined by N. D. Patel
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Patent number: 5530314Abstract: An electron-emitting device having an electron-emitting portion between electrodes on a substrate comprises a region A and a region B, the region A being electrically connected through the region B to at least one of the electrodes, electric conductivity .sigma..sub.1 of the material mainly constituting the region A and electric conductivity of the material .sigma..sub.2 mainly constituting the region B being in the relation of .sigma..sub.1 >.sigma..sub.2, and the region A being the electron-emitting portion. An electron beam-generating apparatus and image-forming apparatus comprise the electron-emitting device and a modulation means for modulating the electron beams emitted from the electron-emitting elements in accordance with information signals.Type: GrantFiled: September 12, 1994Date of Patent: June 25, 1996Assignee: Canon Kabushiki KaishaInventors: Yoshikazu Banno, Ichiro Nomura, Hidetoshi Suzuki, Takashi Noma, Rie Ueno
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Patent number: 5498926Abstract: A photomultiplier which can be easily made compact has a dynode unit constituted by stacking a plurality of stages of dynode plates in an electron incident direction in a vacuum container constituted by a housing and a base member integrally formed with the housing. Each dynode plate has an engaging member engaged with a connecting pin for applying a voltage at a side surface thereof. Through holes for guiding the connecting pins from the outside of the container are formed in the base member. Each engaging member is arranged not to overlap the remaining engaging members in the stacking direction of the dynode plates. The arrangement position of each engaging member and the arrangement position of the through hole for guiding the corresponding connecting pin to be connected are matched with each other.Type: GrantFiled: April 28, 1994Date of Patent: March 12, 1996Assignee: Hamamatsu Photonics K.K.Inventors: Hiroyuki Kyushima, Koji Nagura, Yutaka Hasegawa, Eiichiro Kawano, Tomihiko Kuroyanagi, Akira Atsumi, Masuya Mizuide
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Patent number: 5495138Abstract: To provide a strain relief in a base for an electric lamp, adapted for coction to an external electrical energy source by at least one connection cable (6a, 6b) extending through and into the base, the base (2) is formed with a strain relief arrangement which includes a resilient sleeve (11) having an inner wall surrounding the at least one connection cable and, within the base bottom portion (9, 9'), a sleeve reception structure (9a) positioned inwardly of the bottom of the base, which includes a sleeve reception bore (10a, 10b) receiving and surrounding the resilient sleeve (11a, 11b) and exerting circumferentially uniformly, radially inwardly directed forces on the resilient sleeve. This decreases the diameter of the sleeve so that the inner wall thereof engages, clamps and squeezes the deformable insulation of the at least one connection cable and, also, can interengage or interlock therewith. The bottom portion (9) and the top portion (7) of the base are snapped together.Type: GrantFiled: September 7, 1994Date of Patent: February 27, 1996Assignee: Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen mbHInventors: Gerhard Behr, Peter Helbig, Hermann Steiner
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Patent number: 5495143Abstract: A gas discharge device includes an envelope containing a low pressure gas and a field emitter array having microscopic emitter elements which emit electrons into the gas. The device can be employed, for example, in a gas discharge lamp.Type: GrantFiled: August 12, 1993Date of Patent: February 27, 1996Assignee: Science Applications International CorporationInventors: Michael Lengyel, Douglas A. Kirkpatrick, George L. Bergeron, III, Otto J. Hunt, James J. Hickman, Stanley E. Busby
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Patent number: 5493174Abstract: An imaging tube having a fiber optic plate (FOP) as an output faceplate. On one surface of the FOP within an evacuated envelope is deposited a first transparent conductive layer. On the first transparent conductive layer is deposited a fluorescent layer. On the fluorescent layer is deposited a metal-back electrode. On the other surface of the FOP outside the evacuated envelope is deposited a second transparent conductive layer. The first transparent conductive layer and the metal-back electrode are electrically connected so that an electrical field is not developed across the fluorescent layer when the metal-back electrode is applied with a high positive voltage and the second transparent conductive layer is grounded. Therefore, even if leakage currents flow through the FOP, electric charges impinging upon the first transparent conductive layer will not cause the fluorescent layer to generate noise spots.Type: GrantFiled: March 18, 1993Date of Patent: February 20, 1996Assignee: Hamamatsu Photonics K.K.Inventor: Kuniyoshi Mori
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Patent number: 5491380Abstract: A photomultiplier which can be easily made compact has a dynode unit having a plurality of dynode plates stacked in an electron incident direction in a vacuum container fabricated by a housing and a base member integrally formed with the housing. Each dynode plate is constituted by welding at least two plates overlapping each other. The welding positions do not overlap each other in the stacking direction of the dynode plates. With this structure, field discharge at the welding portions between the dynode plates can be prevented to reduce noise.Type: GrantFiled: April 28, 1994Date of Patent: February 13, 1996Assignee: Hamamatsu Photonics, K.K.Inventors: Hiroyuki Kyushima, Koji Nagura, Yutaka Hasegawa, Eiichiro Kawano, Tomihiko Kuroyanagi, Akira Atsumi, Masuya Mizuide
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Patent number: 5466989Abstract: A discharge tube according to the present invention is constructed such that it includes a cylindrical container made of an insulation tube, a pair of discharge electrodes provided at opposite ends of the container, a plurality of insulation coated lines containing a gas-ionization accelerator therein, which insulation coated lines being provided in the grooves formed on the inner surface of the container covering the regions surrounding a cathode and a discharge space therein in a substantially same distance from a center axis of the container, wherein the container further comprises a flange portion formed at the cathode-side thereof in such a way that it protrudes inwardly, and the insulation coated lines are provided on the inner surface of the container except the inner side of the flange portion.Type: GrantFiled: January 19, 1994Date of Patent: November 14, 1995Assignee: Yazaki CorporationInventors: Takashi Sato, Takahisa Suzuki, Hiromitsu Tsuchiya, Tetsuya Mitani
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Patent number: 5463270Abstract: An insulating base for a discharge lamp device which provides good insulation between a lead support connected to a front end lead of an arc tube and a lead disposed on the rear side of the arc tube. The insulating base includes a base main body formed of synthetic resin. The base main body is a disk-shaped injection molding which includes a lead support insertion hole in the form of a first longitudinal through hole for mounting a lead support supporting the front end portion of an arc tube and acting as a current path to a lead disposed on the front side of the arc tube, and a lead insertion hole in the form of a second longitudinal through hole for insertion of a lead disposed on the rear end side of the arc tube.Type: GrantFiled: February 14, 1994Date of Patent: October 31, 1995Assignee: Koito Manufacturing Co., Ltd.Inventors: Yukio Wakimizu, Kunimasa Motiduki, Masakazu Nagasawa
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Patent number: 5463267Abstract: In spark ignited engine configurations, it is common to provide a spark plug that has a spark gap that has dimension that will accommodate good starting capabilities for the engine. In some cases, this spark gap is larger than required for the engine to run efficiently, especially at high loads. As a result, the voltage required to bridge the gap when the engine is running at high loads is much higher than necessary and causes erosion of the electrode and a build up of deposits on the ground strap. Ultimately, this greatly reduces the life of the spark plug. The present invention provides a spark plug that utilizes an adjusting means that is connected to the electrode of the spark plug and functions to move the electrode with respect to the ground strap to adjust the gap therebetween. The adjusting means is responsive to the temperature of the spark plug which will vary with engine loads or an increase in pressure within the combustion chamber.Type: GrantFiled: January 10, 1995Date of Patent: October 31, 1995Assignee: Caterpillar Inc.Inventor: Scott R. Conway
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Patent number: 5461281Abstract: To prevent attack on electrodes (4, 5) within a discharge vessel (2) by an ionizable metal halide fill, due to spurious or free oxygen arising within the lamp during operation thereof, which oxygen combines with the metal of the electrodes, and is then dissociated in the arc and re-deposited at the hottest part of the electrode, an oxygen removing getter material is introduced into the discharge vessel. Spurious oxygen arises due to emission of oxygen from the glass wall of the discharge vessel, typically quartz glass, and unavoidable contaminants of the fill substance. The getter material is, preferably, phosphorus, boron or aluminum, a halide of the foregoing, a tungsten boron compound, a tin phosphorus compound, or scandium or a rare earth. If the getter is a halide, iodine, bromine or chloride are suitable. The getter may be introduced in quantities of between 0.05 to 0.6%, depending on the getter substances and the fill composition.Type: GrantFiled: July 7, 1994Date of Patent: October 24, 1995Assignee: Patent-Treuhand-Gesellschaft f. elektrische Gluehlampen mbHInventors: Dietrich Fromm, Guenter Soehring, Richard Ullmann
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Patent number: 5459372Abstract: An impregnated cathode structure has: (1) a sleeve having a truncated conically-shaped top portion with an opening having a predetermined diameter at the center thereof; (2) oxide cathode material formed within and conforming to the shape of the sleeve to form a point exposed through the opening; (3) a receiver forming part of said sleeve for retaining the oxide cathode material; (4) a backing plug which divides the inside of the sleeve so as to form a space for the receiver; and (5) a heater installed in the sleeve below the backing plug.Type: GrantFiled: November 28, 1994Date of Patent: October 17, 1995Assignee: Samsung Electron Devices Co., Ltd.Inventor: Hwanchul Roh
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Patent number: 5457355Abstract: Providing a field emitter with an asymmetrical emitter structure having a very sharp tip in close proximity to its gate. One preferred embodiment of the present invention includes an asymmetrical emitter and a gate. The emitter having a tip and a side is coupled to a substrate. The gate is connected to a step in the substrate. The step has a top surface and a side wall that is substantially parallel to the side of the emitter. The tip of the emitter is in close proximity to the gate. The emitter is at an emitter potential, and the gate is at a gate potential such that with the two potentials at appropriate values, electrons are emitted from the emitter. In one embodiment, the gate is separated from the emitter by an oxide layer, and the emitter is etched anisotropically to form its tip and its asymmetrical structure.Type: GrantFiled: December 1, 1993Date of Patent: October 10, 1995Assignee: Sandia CorporationInventors: James G. Fleming, Bradley K. Smith
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Patent number: 5457361Abstract: An ion removing device includes an ion inducing electrode provided in a vacuum container in a deflection portion of an electron accumulating ring along an inner peripheral wall of the vacuum container, an ion removing electrode provided in the vacuum container near each of ports of the defection portion of the electron accumulating ring, and a power source for applying a voltage to both the ion inducing electrode and the ion removing electrodes. An ion removing method includes the steps of inducing ions trapped by a potential generated by an electron beam to ports of a deflection portion of an electron accumulating ring by forming an electric field in a vacuum container in the deflection portion, and removing the ions which have been inducted to the ports of the defection portion.Type: GrantFiled: February 9, 1993Date of Patent: October 10, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shuhei Nakata, Hirofumi Tanaka, Itsuo Kodera, Tetsuya Nakanishi
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Patent number: 5449966Abstract: A Double Sliding Spark Plug as a Volume Ignition System for Internal Combustion Engines causes ignition processes of the air-fuel mixture by two simultaneously conical or cylindrical sliding discharges between a conical or cylindrical high voltage electrode (1) located inside two solid insulation parts (4) and (5) and two circular low voltage electrodes (2) and (3). Those sliding discharges are on outer large conical or cylindrical surfaces of insulation parts (4) and (5) with high diameters. The outside low voltage electrode (2) is connected to a metallic body of this spark plug and to the outer conical or cylindrical surface of the outside insulation part (4). The inside cylindrical or conical low voltage electrode (3) is connected to the inner conical or cylindrical surface of the inside insulation part (5).Type: GrantFiled: April 26, 1991Date of Patent: September 12, 1995Assignee: Wojciech Marian TurkowskiInventor: Wojciech M. Turkowski
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Patent number: 5444331Abstract: A dielectric barrier discharge lamp has a discharge vessel having a discharge chamber filled with a discharge gas. Excimer molecules are developed due to a dielectric barrier discharge. The discharge vessel is equipped with a window for the output of the light radiated from the excimer molecules. A getter space, equipped with a getter, communicates with the discharge chamber. A common wall separates the discharge chamber from the getter space, or a separately arranged getter space is connected to the discharge chamber via a tube. In one form, the discharge vessel and window is made of quartz glass containing less than 10 ppm of OH radicals by weight.Type: GrantFiled: January 21, 1994Date of Patent: August 22, 1995Assignee: Ushiodenki Kabushiki KaishaInventors: Hiromitsu Matsuno, Tatsushi Igarashi, Tatsumi Hiramoto, Yasuo Oonishi
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Patent number: 5442255Abstract: An electron tube is constructed to seal in vacuum a substrate for supporting an electron collect electrode, a substrate for supporting a cold cathode array, and a part of an electrode structure. Electrons, emitted from an electron discharge area composed of the cold cathode array and the electrode for picking up an electron beam, pass through a vacuum area and reach an electron collect electrode. The vacuum area is formed by anode jointing the outer peripheral portion of the substrate 1 for supporting the electron collect electrode with the part of the electrode for picking up an electron beam in a vacuum bath. After sealing them in vacuum, the vacuum level of the vacuum area can be kept unchanged when the electron tube is taken out of the vacuum vessel.Type: GrantFiled: August 12, 1993Date of Patent: August 15, 1995Assignee: Sharp Kabushiki KaishaInventors: Tomokazu Ise, Reiko Imamoto
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Patent number: 5442253Abstract: Picture display device having a vacuum envelope for displaying pictures composed of pixels on a luminescent screen, comprising a plurality of juxtaposed sources for producing electrons, local electron ducts cooperating with the sources and having walls of electrically insulating material with a secondary emission coefficient suitable for electron transport for transporting, through vacuum, produced electrons in the form of electron currents through juxtaposed trajectories at a short distance from the luminescent screen, and means for withdrawing each electron current at predetermined locations from its duct and directing it towards a desired location on the luminescent screen for producing a picture composed of pixels.Type: GrantFiled: March 21, 1994Date of Patent: August 15, 1995Assignee: U.S. Philips CorporationInventors: Gerardus G. P. Van Gorkom, Petrus H. F. Tormpenaars
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Patent number: 5440211Abstract: A toroidal cavity-type electron accelerator is provided with a pair of electron beam sources. The beams from the two sources are respectively injected into the accelerating cavity at the mid-plane thereof and at a point displaced from the mid-plane whereby the electrons comprising the beam injected on the mid-plane will be accelerated while the electrons comprising the beam injected at the off mid-plane location will be decelerated and contribute their energy to producing a field for accelerating the electrons of the other beam.Type: GrantFiled: December 20, 1993Date of Patent: August 8, 1995Assignee: Ion Beam Applications Societe AnonymeInventor: Yves Jongen
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Patent number: 5438235Abstract: An electrostatic shield is provided between the induction coil and the arc tube of an electrodeless HID lamp. In one embodiment, the shield is a transparent glass cylinder coated with a thin, transparent, conductive layer of tin oxide. In another embodiment, the electrostatic shield is a conductive, transparent tin oxide coating applied to either the inner or outer surface of an outer light-transmissive jacket surrounding the arc tube. The tin oxide layer is discontinuous so as to minimize currents induced in the conductive tin oxide layer by the induction coil. The thickness of the tin oxide layer is sufficient to make it conductive and form an approximately equipotential surface, thereby shielding the arc tube and plasma discharge from intense electric fields, reducing arc tube wall damage and increasing lamp life. In addition, tin oxide functions as an infrared reflector which returns infrared radiation to the arc tube, resulting in higher efficacy.Type: GrantFiled: October 5, 1993Date of Patent: August 1, 1995Assignee: General Electric CompanyInventors: Timothy J. Sommerer, Hseuh-Rong Chang, Arthur Klein, III, Victor D. Roberts, Harald L. Witting, George A. Farrall
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Patent number: 5434469Abstract: In a device for ion generation, the ionization chamber is characterized by walls coated with a material with a high coefficient of secondary emission, such as a suitable glass; this enables the energy yield and mass yield of the device to be improved with respect to known techniques. (FIG.Type: GrantFiled: October 8, 1992Date of Patent: July 18, 1995Assignee: Proel Tecnologie S.p.A.Inventor: Gianfranco Cirri